<template>
  <div>
    <el-form :rules="rules"
             v-loading="loading"
             element-loading-text="正在登录..."
             element-loading-spinner="el-icon-loading"
             element-loading-background="rgba(0, 0, 0, 0.8)"
             ref="loginForm"
             :model="loginForm"
             class="loginContainer">
      <h3 class="loginTitle">系统登录</h3>
      <el-form-item prop="username">
        <el-input type="text" auto-complete="false" v-model="loginForm.username" placeholder="请输入用户名"></el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input type="password" auto-complete="false" v-model="loginForm.password" placeholder="请输入密码"></el-input>
      </el-form-item>
      <el-form-item prop="code">
        <el-input type="text" auto-complete="false" v-model="loginForm.code" placeholder="点击图片更换验证码"
        style="width: 250px;margin-right: 5px"></el-input>
        <img :src="captchaUrl" @click="updateCaptcha">
      </el-form-item>
      <el-checkbox v-model="checked" class="loginRemember">记住我</el-checkbox>
      <el-button type="primary" style="width: 100%" @click="submitForm">登录</el-button>
    </el-form>
  </div>
</template>

<script>
export default {
  name: "Login",
  data(){
    return{
      captchaUrl:'/captcha?time='+new Date(),
      loginForm:{
        username: 'admin',
        password: '123',
        code:""
      },
      loading:false,
      checked:true,
      rules:{
        username:[{required:true,message:"请输入用户名",trigger:'blur'}],
        password:[{required:true,message:"请输入密码",trigger:'blur'}],
        code:[{required:true,message:"请输入验证码",trigger:'blur'}]
      }
    }
  },
  methods: {
    updateCaptcha(){
      this.captchaUrl = '/captcha?time='+new Date();
    },
    submitForm() {
      this.$refs.loginForm.validate((valid) => {
        if (valid) {
          this.loading = true;
          this.postRequest('/login',this.loginForm).then(resp =>{
            this.loading = false;
            if(resp){
              //存储用户token
              const tokenStr = resp.obj.tokenHead+resp.obj.token;
              window.sessionStorage.setItem('tokenStr',tokenStr);
              //跳转首页
              let path = this.$route.query.redirect;
              this.$router.replace((path=='/'||path==undefined)?'/home':path);
            }
          });
        } else {
          this.$message.error('请输入所有字段!!');
          return false;
        }
      });
    }
  }
}
</script>

<style>
.loginContainer{
  width: 350px;
  margin: 180px auto;
  padding: 15px 35px 35px 32px;
  border: solid 1px #eaeaea;
  border-radius: 15px;
  background-clip: padding-box;
  background-color: #fff;
  box-shadow: 0 0 15px #cac6c6;
}
.loginTitle{
  margin: 0 auto 40px auto;
  text-align: center;
}
.loginRemember{
  text-align: left;
  margin: 0 0 15px 0;
}
.el-form-item__content{
  display: flex;
  align-items: center;
}
</style>